private void addOrdering(InterpretationContext context, ObjectOrdering ordering)
throws QueryException {
ItemPath orderByPath = ordering.getOrderBy();
// TODO if we'd like to have order-by extension properties, we'd need to provide itemDefinition
// for them
ProperDataSearchResult<JpaDataNodeDefinition> result =
context
.getItemPathResolver()
.findProperDataDefinition(
context.getRootEntityDefinition(), orderByPath, null, JpaDataNodeDefinition.class);
if (result == null) {
LOGGER.error(
"Unknown path '"
+ orderByPath
+ "', couldn't find definition for it, "
+ "list will not be ordered by it.");
return;
}
JpaDataNodeDefinition targetDefinition = result.getLinkDefinition().getTargetDefinition();
if (targetDefinition instanceof JpaAnyContainerDefinition) {
throw new QueryException(
"Sorting based on extension item or attribute is not supported yet: " + orderByPath);
} else if (targetDefinition instanceof JpaReferenceDefinition) {
throw new QueryException("Sorting based on reference is not supported: " + orderByPath);
} else if (result.getLinkDefinition().isMultivalued()) {
throw new QueryException(
"Sorting based on multi-valued item is not supported: " + orderByPath);
} else if (targetDefinition instanceof JpaEntityDefinition) {
throw new QueryException("Sorting based on entity is not supported: " + orderByPath);
} else if (!(targetDefinition instanceof JpaPropertyDefinition)) {
throw new IllegalStateException("Unknown item definition type: " + result.getClass());
}
JpaEntityDefinition baseEntityDefinition = result.getEntityDefinition();
JpaPropertyDefinition orderByDefinition = (JpaPropertyDefinition) targetDefinition;
String hqlPropertyPath =
context
.getItemPathResolver()
.resolveItemPath(
orderByPath, null, context.getPrimaryEntityAlias(), baseEntityDefinition, true)
.getHqlPath();
if (RPolyString.class.equals(orderByDefinition.getJpaClass())) {
hqlPropertyPath += ".orig";
}
RootHibernateQuery hibernateQuery = context.getHibernateQuery();
if (ordering.getDirection() != null) {
switch (ordering.getDirection()) {
case ASCENDING:
hibernateQuery.addOrdering(hqlPropertyPath, OrderDirection.ASCENDING);
break;
case DESCENDING:
hibernateQuery.addOrdering(hqlPropertyPath, OrderDirection.DESCENDING);
break;
}
} else {
hibernateQuery.addOrdering(hqlPropertyPath, OrderDirection.ASCENDING);
}
}
